Circuits and antennas for improving top lobe suppression

Abstract

This invention provides a circuit and antenna for improving top lobe suppression. The circuit for improving top lobe suppression includes: a first power divider, a second power divider, a third power divider, a first coupler, a second coupler, a first T1 phase shifter, a second T1 phase shifter, a first T2 phase shifter, a second T2 phase shifter, a first T3 phase shifter, a second T3 phase shifter, and a phase compensation section. This invention obtains amplitude distribution that changes with phase through the cooperation of the power divider and coupler with equivalent phase-variable power divider. Then, by using multiple power dividers and phase shifters of different proportions, a circuit is formed that has the function of increasing amplitude distribution with equal arithmetic progression with port phase, which is beneficial to improving the top lobe suppression level after the antenna is electrically downtilted, and solving the problem of neighboring cell interference caused by poor top lobe suppression in actual antenna use.

Description

Technical Field

[0001] This invention relates to the field of mobile communication equipment technology, and more particularly to a circuit and antenna for improving top lobe suppression. Background Technology

[0002] An antenna is a conversion device that transforms radio frequency signals in a feed line into electromagnetic wave signals in free space. Its function is to establish an aerial "bridge" for communication and information exchange between wireless users and the communication system. With the increasing wireless communication needs of users, the coverage depth of wireless communication networks is constantly increasing, and network quality requirements are also constantly rising. The requirements for base station antenna product specifications are also constantly increasing, driving the development of products towards refinement. Traditional electrically adjustable downtilt antennas use a feed network whose amplitude remains constant during the electrical downtilt process. After electrical downtilt, due to complex phase superposition and interference from adjacent elements, the upper lobe suppression level inevitably decreases, and the suppression capability worsens with increasing downtilt angle, while neighboring cell interference becomes stronger. Summary of the Invention

[0003] This invention provides a circuit and antenna for improving upper lobe suppression, aiming to solve the problem in existing base station antenna technology where upper lobe suppression deteriorates as the main lobe electrical downtilt angle increases.

[0004] To address the problems existing in the prior art, the present invention provides a circuit for improving upper lobe suppression, which is used to connect to a radiation array. The radiation array includes a first radiation unit, a second radiation unit, a third radiation unit, a fourth radiation unit, and a fifth radiation unit arranged sequentially. The circuit for improving upper lobe suppression includes: a first power divider, a second power divider, a third power divider, a first coupler, a second coupler, a first T1 phase shifting segment, a second T1 phase shifting segment, a first T2 phase shifting segment, a second T2 phase shifting segment, a first T3 phase shifting segment, a second T3 phase shifting segment, and a phase compensation segment.

[0005] The input terminal of the first power divider is connected to the input signal, the first output terminal of the first power divider is connected to the input terminal of the second power divider, the second output terminal of the first power divider is connected to the input terminal of the first T1 phase shifter, and the third output terminal of the first power divider is connected to the input terminal of the third power divider; the first and second output terminals of the second power divider are correspondingly connected to the first and second input terminals of the first coupler, and the first and second output terminals of the third power divider are correspondingly connected to the first and second input terminals of the second coupler.

[0006] The first output terminal of the first coupler is connected to the input terminal of the second T2 phase shifting segment, the second output terminal of the first coupler is connected to the input terminal of the second T1 phase shifting segment, the first output terminal of the second coupler is connected to the input terminal of the second T3 phase shifting segment, and the second output terminal of the second coupler is connected to the input terminal of the second T1 phase shifting segment.

[0007] The output terminal of the second T2 phase shifting segment is connected to the first radiation unit; the output terminal of the second T1 phase shifting segment is connected to the input terminal of the first T2 phase shifting segment; the output terminal of the first T2 phase shifting segment is connected to the second radiation unit; the output terminal of the first T1 phase shifting segment is connected to the input terminal of the phase compensation segment; the output terminal of the phase compensation segment is connected to the third radiation unit; the output terminal of the second T1 phase shifting segment is connected to the input terminal of the first T3 phase shifting segment; the output terminal of the first T3 phase shifting segment is connected to the fourth radiation unit; and the output terminal of the second T3 phase shifting segment is connected to the fifth radiation unit.

[0008] Among them, starting from the third radiation unit and moving towards both sides, the signal amplitudes of the third radiation unit, the second radiation unit, and the first radiation unit gradually decrease, the signal amplitudes of the third radiation unit, the fourth radiation unit, and the fifth radiation unit gradually decrease, and the signal phases of the first radiation unit, the second radiation unit, the third radiation unit, the fourth radiation unit, and the fifth radiation unit exhibit variable arithmetic progression.

[0009] According to the present invention, a circuit for improving top lobe suppression is provided, wherein the second power divider and the third power divider are both equivalent phase variable power dividers, and the equivalent phases of the second power divider and the third power divider change synchronously.

[0010] The equivalent phase changes of the first output port and the second output port of the second power divider are inversely related in terms of increase and decrease, and the absolute values ​​of the changes are equal. The equivalent phase changes of the first output port and the second output port of the third power divider are inversely related in terms of increase and decrease, and the absolute values ​​of the changes are equal.

[0011] According to a circuit for improving top lobe suppression provided by the present invention, both the second power divider and the third power divider include a power divider line and a sliding medium slidably disposed on the power divider line. The power divider line has one input port and two output ports, and the sliding medium is used to adjust the equivalent phase of the two output ports during the sliding process.

[0012] According to the present invention, a circuit for improving top lobe suppression is provided, wherein the port isolation between the first input port and the second input port of the first coupler and the second coupler is greater than 30dB, and there is a fixed phase difference of 90° between the first output port and the second output port of the first coupler and the second coupler.

[0013] According to the present invention, a circuit for improving upper lobe suppression is provided in which the equivalent phase of the first T1 phase shift segment and the second T1 phase shift segment are synchronously increased or decreased.

[0014] According to the present invention, a circuit for improving top lobe suppression is provided in which the equivalent phases of the first T1 phase shifter, the second T1 phase shifter, the second power divider, and the third power divider change synchronously, and the absolute value ratio of the change relationship is 1:2:1:1.

[0015] According to the present invention, a circuit for improving upper lobe suppression is provided in which the equivalent phase of the first T2 phase shift segment and the second T2 phase shift segment increase or decrease synchronously; the equivalent phase of the first T3 phase shift segment and the second T3 phase shift segment increase or decrease synchronously.

[0016] According to the present invention, a circuit for improving upper lobe suppression is provided in which the equivalent phases of the first T2 phase shift segment, the second T2 phase shift segment, the first T3 phase shift segment, and the second T3 phase shift segment change synchronously, the equivalent phase change relationships of the first T2 phase shift segment, the second T2 phase shift segment, the first T3 phase shift segment, and the second T3 phase shift segment are mutually inversely increasing and decreasing, and the absolute value ratio of the equivalent phase change relationships of the first T2 phase shift segment, the second T2 phase shift segment, the first T3 phase shift segment, and the second T3 phase shift segment is 1:2:1:2.

[0017] The present invention also provides an antenna, including a radiating array and a circuit for improving upper lobe suppression connected to the radiating array, wherein the circuit for improving upper lobe suppression is the circuit for improving upper lobe suppression as described in any of the preceding claims.

[0018] The feed network for improved top lobe suppression provided by this invention achieves phase-varying amplitude distribution through the cooperation of an equivalent phase-variable power divider and a coupler. A complete feed network is then formed by multiple power dividers and phase-shifting segments of varying proportions. This feed network features amplitude distribution that increases progressively with increasing port phase and tapers. By increasing the amplitude taper, the antenna's top lobe suppression level can be effectively improved, achieving the effect that top lobe suppression does not deteriorate with increasing electrical downtilt angle. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the circuit for improving upper lobe suppression provided by the present invention;

[0021] Figure 2 for Figure 1 Schematic diagram of the second power divider in the middle;

[0022] Figure 3 for Figure 1 A schematic diagram of the structure of the first coupler.

[0023] Reference numerals: 1: Circuit; 2: First power divider; 3: Second power divider; 31: Power divider line; 32: Sliding medium; 33: Input port; 34: First output port; 35: Second output port; 4: Third power divider; 5: First coupler; 51: Input port; 52: Straight-through port; 53: Coupler port; 54: Isolation port; 6: Second coupler; 7: First T1 phase shifting segment; 8: Second T1 phase shifting segment; 9: First T2 phase shifting segment; 10: Second T2 phase shifting segment; 11: First T3 phase shifting segment; 12: Second T3 phase shifting segment; 13: Phase compensation segment; 14: Radiation element array; 141: First radiation element; 142: Second radiation element; 143: Third radiation element; 144: Fourth radiation element; 145: Fifth radiation element. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0025] In the description of the embodiments of the present invention, it should be noted that the terms "center," "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0027] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0029] The following is combined with Figures 1-3 The present invention describes a circuit 1 and an antenna for improving upper lobe suppression provided by the present invention.

[0030] Traditional technologies for base station antennas suffer from a deterioration in top lobe suppression as the main lobe electrical downtilt angle increases. To address this issue, this invention provides a circuit 1 for improving top lobe suppression, used to connect to a radiating array. (See also...) Figure 1 The radiation unit array 14 includes a first radiation unit 141, a second radiation unit 142, a third radiation unit 143, a fourth radiation unit 144, and a fifth radiation unit 145 arranged sequentially. Specifically, the circuit 1 for improving upper lobe suppression includes: a first power divider 2, a second power divider 3, a third power divider 4, a first coupler 5, a second coupler 6, a first T1 phase shifting segment 7, a second T1 phase shifting segment 8, a first T2 phase shifting segment 9, a second T2 phase shifting segment 10, a first T3 phase shifting segment 11, a second T3 phase shifting segment 12, and a phase compensation segment 13;

[0031] The input terminal of the first power divider 2 is connected to the input signal; the first output terminal of the first power divider 2 is connected to the input terminal of the second power divider 3; the second output terminal of the first power divider 2 is connected to the input terminal of the first T1 phase shifter 7; and the third output terminal of the first power divider 2 is connected to the input terminal of the third power divider 4. The first and second output terminals of the second power divider 3 are correspondingly connected to the first and second input terminals of the first coupler 5; and the first and second output terminals of the third power divider 4 are correspondingly connected to the first and second input terminals of the second coupler 6.

[0032] The first output terminal of the first coupler 5 is connected to the input terminal of the second T2 phase shifting segment 10, the second output terminal of the first coupler 5 is connected to the input terminal of the second T1 phase shifting segment 8, the first output terminal of the second coupler 6 is connected to the input terminal of the second T3 phase shifting segment 12, and the second output terminal of the second coupler 6 is connected to the input terminal of the second T1 phase shifting segment 8.

[0033] The output terminal of the second T2 phase shifting segment 10 is connected to the first radiation unit 141; the output terminal of the second T1 phase shifting segment 8 is connected to the input terminal of the first T2 phase shifting segment 9; the output terminal of the first T2 phase shifting segment 9 is connected to the second radiation unit 142; the output terminal of the first T1 phase shifting segment 7 is connected to the input terminal of the phase compensation segment 13; the output terminal of the phase compensation segment 13 is connected to the third radiation unit 143; the output terminal of the second T1 phase shifting segment 8 is connected to the input terminal of the first T3 phase shifting segment 11; the output terminal of the first T3 phase shifting segment 11 is connected to the fourth radiation unit 144; and the output terminal of the second T3 phase shifting segment 12 is connected to the fifth radiation unit 145.

[0034] In summary, the circuit 1 for improving upper lobe suppression provided by this invention acquires five signals and feeds them into five radiating units respectively. A first power divider 2 splits the signals into three paths. The first signal is input to a second power divider 3. The second power divider 3 splits the input signal into two paths, which are input to the two input ports of a first coupler 5, and then re-form two new signals. One signal is fed into the first radiating unit 141 through the second T2 phase shifter 10, and the other signal is fed into the second radiating unit 142 through the second T1 phase shifter 8 and the first T2 phase shifter 9. The second signal split from the power divider 2 is fed into the third radiation unit 143 through the first T1 phase shift section 7 and the phase compensation section 13. The third signal split from the first power divider 2 is input into the third power divider 4. The third power divider 4 splits the input signal into two paths and inputs them into the two input ports of the second coupler 6, and re-forms two new signals. One of the signals is fed into the fifth radiation unit 145 through the second T3 phase shift section 12, and the other is fed into the fourth radiation unit 144 through the second T1 phase shift section 8 and the first T3 phase shift section 11.

[0035] With this configuration, starting from the third radiating element 143 and moving towards both sides, the signal amplitudes of the third radiating element 143, the second radiating element 142, and the first radiating element 141 gradually decrease, while the signal amplitudes of the third radiating element 143, the fourth radiating element 144, and the fifth radiating element 145 gradually decrease. The signal phases of the first radiating element 141, the second radiating element 142, the third radiating element 143, the fourth radiating element 144, and the fifth radiating element 145 exhibit a variable arithmetic progression. It should be noted that in the technical solution provided by this invention, each of the five radiating elements can obtain a set of signals with unequal amplitudes and a variable arithmetic progression in phase. This circuit has the function of increasing the phase arithmetic progression at the port and tapering the amplitude distribution progressively. By increasing the amplitude tapering, the upper lobe suppression level of the antenna can be effectively improved, achieving the effect that the upper lobe suppression does not deteriorate as the electrical downtilt angle increases.

[0036] Specifically, both the second power divider 3 and the third power divider 4 are equivalent phase variable power dividers, and their equivalent phases change synchronously. The changes in the equivalent phases of the first and second output ports of the second power divider 3 are inversely proportional in increase and decrease, and their absolute values ​​are equal. Similarly, the changes in the equivalent phases of the first and second output ports of the third power divider 4 are inversely proportional in increase and decrease, and their absolute values ​​are equal. Please refer to [link / reference]. Figure 2Both the second power divider 3 and the third power divider 4 include a power divider line 31 and a sliding medium 32 slidably disposed on the power divider line 31. The power divider line 31 has one input port 33 and two output ports. The sliding medium 32 can slide on the power divider line 31. During the sliding process, the equivalent phase from the input port 33 to the first output port 34 and the second output port 35 can be changed. The absolute values ​​of the phase changes of the first output port 34 and the second output port 35 are equal, and the increase and decrease relationships are inverse.

[0037] Furthermore, the port isolation between the first input port and the second input port of the first coupler 5 and the second coupler 6 is greater than 30dB, and there is a fixed 90° phase difference between the first output port and the second output port of the first coupler 5 and the second coupler 6. Both the first coupler 5 and the second coupler 6 are power dividers with equivalent variable phases. By adjusting the equivalent phase of the power divider, the signal amplitude at the two output ports of the two couplers can vary accordingly, achieving the effect of amplitude distribution varying with power. Please refer to [link to relevant documentation]. Figure 3 The diagram shows the ports of the first coupler 5 and the second coupler 6. Each coupler includes an input port 51, a through port 52, a coupling port 53, and an isolation port 54. The input port 51 and the isolation port 54 are inverse ports, defined in this invention as two input ports 33, with a port isolation greater than 30dB between them. The through port 52 and the coupling port 53 are defined in this invention as two output ports. A signal input from either input port will result in a fixed 90° phase difference between the signals obtained at both output ports.

[0038] Furthermore, a second T1 phase shifter 8 is connected in series at one of the output ports of the first coupler 5 and the second coupler 6 to compensate for the phase difference caused by the equivalent phase changes of the second power divider 3 and the third power divider 4. A first T1 phase shifter 7 is synchronously set in the second signal output from the first power divider 2 for phase compensation. Both the first T1 phase shifter 7 and the second T1 phase shifter 8 have equivalent phase variable functions, and their phase changes are synchronized in circuit 1, with both increasing and decreasing in tandem. Even further, the equivalent phase changes of the first T1 phase shifter 7, the second T1 phase shifter 8, the second power divider 3, and the third power divider 4 are synchronized, with an absolute value ratio of 1:2:1:1.

[0039] Furthermore, the equivalent phases of the first T2 phase shift segment 9 and the second T2 phase shift segment 10 increase and decrease synchronously, as do the equivalent phases of the first T3 phase shift segment 11 and the second T3 phase shift segment 12. In addition, the equivalent phases of the first T2 phase shift segment 9, the second T2 phase shift segment 10, the first T3 phase shift segment 11, and the second T3 phase shift segment 12 change synchronously, and the relationships of increase and decrease in the equivalent phase changes of the first T2 phase shift segment 9, the second T2 phase shift segment 10, the first T3 phase shift segment 11, and the second T3 phase shift segment 12 are inversely related. The absolute value ratio of the equivalent phase changes of the first T2 phase shift segment 9, the second T2 phase shift segment 10, the first T3 phase shift segment 11, and the second T3 phase shift segment 12 is 1:2:1:2. With this configuration, the circuit can obtain equal phase differences, achieving an electrical downtilt of the radiation pattern.

[0040] It should be noted that in the technical solution provided by the present invention, the first T1 phase shifting segment, the second T1 phase shifting segment, the first T2 phase shifting segment, the second T2 phase shifting segment, the first T3 phase shifting segment, and the second T3 phase shifting segment are all phase shifting circuits. The naming in the present invention is only for the convenience of differentiation and description. Each phase shifting segment can adopt the same or different phase shifting circuit settings, as long as the output phase meets the requirements of the present invention. The present invention does not limit this.

[0041] The present invention also provides an antenna, including a radiating array and a circuit 1 connected to the radiating array for improving upper lobe suppression. Since the main inventive point of the present invention lies in the circuit, other structures of the antenna will not be described in detail.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A circuit for improving upper lobe suppression, for connecting to a radiation array, the radiation array comprising a first radiation unit, a second radiation unit, a third radiation unit, a fourth radiation unit, and a fifth radiation unit arranged sequentially, the circuit for improving upper lobe suppression comprising: First power divider, second power divider, third power divider, first coupler, second coupler, first T1 phase shifter, second T1 phase shifter, first T2 phase shifter, second T2 phase shifter, first T3 phase shifter, second T3 phase shifter, and phase compensation section; The input terminal of the first power divider is connected to the input signal, the first output terminal of the first power divider is connected to the input terminal of the second power divider, the second output terminal of the first power divider is connected to the input terminal of the first T1 phase shifter, and the third output terminal of the first power divider is connected to the input terminal of the third power divider; the first and second output terminals of the second power divider are correspondingly connected to the first and second input terminals of the first coupler, and the first and second output terminals of the third power divider are correspondingly connected to the first and second input terminals of the second coupler. The first output terminal of the first coupler is connected to the input terminal of the second T2 phase shifting segment, the second output terminal of the first coupler is connected to the input terminal of the second T1 phase shifting segment, the first output terminal of the second coupler is connected to the input terminal of the second T3 phase shifting segment, and the second output terminal of the second coupler is connected to the input terminal of the second T1 phase shifting segment. The output terminal of the second T2 phase shifting segment is connected to the first radiation unit; the output terminal of the second T1 phase shifting segment is connected to the input terminal of the first T2 phase shifting segment; the output terminal of the first T2 phase shifting segment is connected to the second radiation unit; the output terminal of the first T1 phase shifting segment is connected to the input terminal of the phase compensation segment; the output terminal of the phase compensation segment is connected to the third radiation unit; the output terminal of the second T1 phase shifting segment is connected to the input terminal of the first T3 phase shifting segment; the output terminal of the first T3 phase shifting segment is connected to the fourth radiation unit; and the output terminal of the second T3 phase shifting segment is connected to the fifth radiation unit. Among them, starting from the third radiation unit and moving towards both sides, the signal amplitudes of the third radiation unit, the second radiation unit, and the first radiation unit gradually decrease, the signal amplitudes of the third radiation unit, the fourth radiation unit, and the fifth radiation unit gradually decrease, and the signal phases of the first radiation unit, the second radiation unit, the third radiation unit, the fourth radiation unit, and the fifth radiation unit exhibit variable arithmetic progressions. Both the second power divider and the third power divider are equivalent phase variable power dividers, and the equivalent phases of the second power divider and the third power divider change synchronously. The equivalent phase changes of the first output port and the second output port of the second power divider are inversely related in terms of increase and decrease, and the absolute values ​​of the changes are equal. The equivalent phase changes of the first output port and the second output port of the third power divider are inversely related in terms of increase and decrease, and the absolute values ​​of the changes are equal.

2. The circuit for improving upper lobe suppression according to claim 1, characterized in that, Both the second power divider and the third power divider include a power divider line and a sliding medium slidably disposed on the power divider line. The power divider line has one input port and two output ports. The sliding medium is used to adjust the equivalent phase of the two output ports during the sliding process.

3. The circuit for improving upper lobe suppression according to claim 1, characterized in that, The port isolation between the first input port and the second input port of the first coupler and the second coupler is greater than 30dB, and there is a fixed phase difference of 90° between the first output port and the second output port of the first coupler and the second coupler.

4. The circuit for improving upper lobe suppression according to claim 1, characterized in that, The equivalent phase of the first TI phase shift segment and the second T1 phase shift segment are set to increase or decrease synchronously.

5. The circuit for improving upper lobe suppression according to claim 4, characterized in that, The equivalent phases of the first T1 phase shifter, the second T1 phase shifter, the second power divider, and the third power divider change synchronously, with an absolute value ratio of 1:2:1:

1.

6. The circuit for improving upper lobe suppression according to claim 1, characterized in that, The equivalent phase of the first T2 phase shift segment and the second T2 phase shift segment increase or decrease synchronously; the equivalent phase of the first T3 phase shift segment and the second T3 phase shift segment increase or decrease synchronously.

7. The circuit for improving upper lobe suppression according to claim 6, characterized in that, The equivalent phases of the first T2 phase shift segment, the second T2 phase shift segment, the first T3 phase shift segment, and the second T3 phase shift segment change synchronously. The equivalent phase change relationships of the first T2 phase shift segment, the second T2 phase shift segment, the first T3 phase shift segment, and the second T3 phase shift segment are mutually inversely increasing and decreasing. The absolute value ratio of the equivalent phase change relationships of the first T2 phase shift segment, the second T2 phase shift segment, the first T3 phase shift segment, and the second T3 phase shift segment is 1:2:1:

2.

8. An antenna, characterized in that, It includes a radiation array and a circuit connected to the radiation array for improving upper lobe suppression, wherein the circuit for improving upper lobe suppression is the circuit for improving upper lobe suppression as described in any one of claims 1-7.

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